26281978 has 8 divisors (see below), whose sum is σ = 41497920. Its totient is φ = 12449340.

The previous prime is 26281933. The next prime is 26281979. The reversal of 26281978 is 87918262.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (26281979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345778 + ... + 345853.

It is an arithmetic number, because the mean of its divisors is an integer number (5187240).

Almost surely, 2^26281978 is an apocalyptic number.

26281978 is a deficient number, since it is larger than the sum of its proper divisors (15215942).

26281978 is a wasteful number, since it uses less digits than its factorization.

26281978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691652.

The product of its digits is 96768, while the sum is 43.

The square root of 26281978 is about 5126.5951663848. The cubic root of 26281978 is about 297.3167310380.

The spelling of 26281978 in words is "twenty-six million, two hundred eighty-one thousand, nine hundred seventy-eight".